The Love Helmet can be found by searching the center plant after talking to the girl in the room on the far right of the third level of Tunlan with Karn leading in his Puka Transformation, and in a chest inside the dig spot southeast of Scande.

The Clear Cloak can be found by searching underneath a stack of heavy crates in the basement of the large house directly behind the Dragon Shrine in Bleak. You need Karn's Doof Transformation to move the crates.

The Clear Cloak can be found by searching underneath a stack of heavy crates in the basement of the large house directly behind the Dragon Shrine in Bleak. You need Karn's Doof Transformation to move the crates.

The Earth Robe can be found by searching under a stack of heavy crates in the flute maker's house in Gust. You need Karn's Doof Transformation to move the crates.

The Flame Armor is located in a chest inside Spyre.

The Stone Helmet is located in a chest inside Pagoda.

The Agile Helmet is located in a chest inside Tock Tower, in a chest inside the dig spot southeast of Scande, and can be purchased during stage 2 of Gobi's Sidequest.

((Mogu can equip the Cursed Helmet but if he does, the Stone Helmet goes to waste since he is the only one who can equip it. The Agile Helmet is listed because even though you lose 6 DEF, it is only WT 1, which is essentially a net gain of 15 ACT when compared to the Stone Helmet.))